1 Answer

    A safety pin, also known as a baby pin, is a variation of the regular pin which includes a simple spring mechanism and a clasp. The clasp serves two purposes: to form a closed loop thereby properly fastening the pin to whatever it is applied to, and to cover the end of the pin to protect the user from the sharp point.

WIKI

Safety pins are commonly used to fasten pieces of fabric or clothing together. They were widely used to fasten cloth diapers (nappies), as the safety clasp prevents the baby from being jabbed. Similarly, they can be used to patch torn or damaged clothing. Safety pins can also be used as an accessory or jewelry, such as earrings, chains, and wristbands. Sometimes they are used to attach an embroidered patch.